package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.*;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.DishFlavorMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.result.PageResult;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.ArrayList;
import java.util.List;

@Service
@Slf4j
public class DishServiceImpl implements DishService {

    @Autowired
    private DishMapper dishMapper;
    @Autowired
    private DishFlavorMapper dishFlavorMapper;
    @Autowired
    private SetmealDishMapper setmealDishMapper;
    @Autowired
    private  SetmealMapper setmealMapper;
    /**
     * 新增菜品he对应的口味
     * @param dishDTO
     */

    @Override
    @Transactional
    public void add(DishDTO dishDTO) {
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO,dish);
        //向菜品表插入1条数据
       dishMapper.insert(dish);  //后绪步骤实现
        //获取insert语句生成的主键值
        Long dishId = dish.getId();
        List<DishFlavor> flavors = dishDTO.getFlavors();
        if (flavors!=null&&flavors.size()>0){
            flavors.forEach(dishFlavor -> {
                dishFlavor.setDishId(dishId);
            });
            //向口味表插入n条数据
            dishFlavorMapper.insertBatch(flavors);//后绪步骤实
        }

    }

    /**
     * 菜品分页查询
     *
     * @param dishPageQueryDTO
     * @return
     */
    @Override
    public PageResult pageQuery(DishPageQueryDTO dishPageQueryDTO) {
        PageHelper.startPage(dishPageQueryDTO.getPage(),dishPageQueryDTO.getPageSize());
        Page<DishVO> page =dishMapper.pageQuery(dishPageQueryDTO);
        return new PageResult(page.getTotal(),page.getResult());
    }

    /**
     * 菜品批量删除
     * @param ids
     * @return
     */
    @Override
    @Transactional
    public void delete(List<Long> ids) {
        for (Long id: ids){
            //判断当前菜品是否能够删除---是否存在起售中的菜品？？
            //查询当前菜品是否存在
         Dish dish=dishMapper.gteByid(id);
         //判断菜品是否为起售状态
         if (dish.getStatus()== StatusConstant.ENABLE){
             throw new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);
         }
        }
        //判断当前菜品是否能够删除---是否被套餐关联了？？
       List<Long> setmealIds= setmealDishMapper.getSetmealIdsByDishIds(ids);
        if (setmealIds!=null&&setmealIds.size()>0){
            //当前菜品处于起售中，不能删除
            throw new DeletionNotAllowedException(MessageConstant.DISH_BE_RELATED_BY_SETMEAL);
        }
        for (Long id : ids) {
            //删除菜品表中的菜品数据
          dishMapper.deleteById(id);
            //删除菜品关联的口味数据
            dishFlavorMapper.deleteByDishId(id);
        }

    }

    /**
     *   根据id查询菜品
     * @param id
     * @param
     * @return
     */
    @Override
    public DishVO fingById(Long id) {
        //根据id，菜名查询菜品数据
        Dish dish = dishMapper.gteByid(id);
        List<DishFlavor> flavors = dishFlavorMapper.getByDishId(id);

        //将查询到的数据封装到VO
        DishVO dishVO = new DishVO();
        BeanUtils.copyProperties(dish,dishVO);
        dishVO.setFlavors(flavors);
        return dishVO;
    }

    /**
     * 修改菜品
     * @param dishDTO
     */
    @Override
    public void updateWithFlavor(DishDTO dishDTO) {
    //基本菜品百品表信息修改
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO,dish);
        dishMapper.updateById(dish);

    //删除所有口味
        dishFlavorMapper.deleteByDishId(dishDTO.getId());
        //重新插入口味数据
        List<DishFlavor> flavors = dishDTO.getFlavors();
        if (flavors!=null&&flavors.size()>0){
            flavors.forEach(dishFlavor -> {
                dishFlavor.setDishId(dishDTO.getId());
            });
            dishFlavorMapper.insertBatch(flavors);
        }
    }

    /**
     * 菜品起售停售
     * @param status
     * @param id
     * @return
     */
    @Override
    @Transactional
    public void updateStatus(Integer status, Long id) {
        //修改菜品的起售停售
        Dish dish = new Dish();
        dish.setStatus(status);
        dish.setId(id);
        dishMapper.updateById(dish);
        //菜品对应的套餐停售
        if (status==StatusConstant.DISABLE){
            // 如果是停售操作，还需要将包含当前菜品的套餐也停售
            List<Long> dishIds = new ArrayList<>();
            dishIds.add(id);
            List<Long> ids = setmealDishMapper.getSetmealIdsByDishIds(dishIds);
           if (ids!=null &&ids.size()>0){
               for (Long id1 : ids) {
                   Setmeal setmeal = Setmeal.builder().status(StatusConstant.DISABLE).id(id1).build();
                   setmealMapper.update(setmeal);
               }
           }
        }
    }

    /**
     *   根据分类id查询菜品
     * @param categoryId
     * @param name
     * @return
     */
    @Override
    public List<Dish> list(Long categoryId, String name) {
        Dish dish = new Dish();
        dish.setCategoryId(categoryId);
        dish.setStatus(StatusConstant.ENABLE);
        dish.setName(name);
        return  dishMapper.list(dish);
    }

    /**
     * 条件查询菜品和口味
     * @param dish
     * @return
     */
    public List<DishVO> listWithFlavor(Dish dish) {
        List<Dish> dishList = dishMapper.list(dish);

        List<DishVO> dishVOList = new ArrayList<>();

        for (Dish d : dishList) {
            DishVO dishVO = new DishVO();
            BeanUtils.copyProperties(d,dishVO);

            //根据菜品id查询对应的口味
            List<DishFlavor> flavors = dishFlavorMapper.getByDishId(d.getId());

            dishVO.setFlavors(flavors);
            dishVOList.add(dishVO);
        }

        return dishVOList;
    }
}
